Carbon typescript description of 'Elliott Dynamometer Instruments', September 1929, a text intended for a publication. 17 numbered pages plus additional sheets; illustrated with ten cyanotypes or blueprints both of photographs and diagrams, also a halftone pull of recorder charts. See separate entries for blueprints.

Photograph (Cyanotype) of a Voltmeter, by Elliott Brothers, 1929

In Elliott Archive 4/20/2, typescipt description of dynamometer instruments. Cyanotype (blueprint) photograph from a glass negative of a voltmeter, forming figure 3 of W. Phillips's text. The instrument and original photograph are pre-1917. Note that the circuit diagram in the lid of the instrument is a blueprint.

Primary Inscriptions:

Intrinsic negative number: 'N552'.

Provenance:

Presented by the Marconi Corporation in 2003. Part of the Elliott Archive.

Photograph (Cyanotype) of a Power Factor Indicator, by Elliott Brothers, 1929

In Elliott Archive 4/20/2, typescipt description of dynamometer instruments. Cyanotype (blueprint) photograph from a glass negative of an edgewise power factor indicator, forming figure 4 of W. Phillips's text. The instrument and original photograph are pre-1917.

Primary Inscriptions:

Provenance:

Presented by the Marconi Corporation in 2003. Part of the Elliott Archive.

In Elliott Archive 4/20/2, typescipt description of dynamometer instruments. Cyanotype (blueprint) photograph from a glass negative of a dynamometer form of recording wattmeter, horizontal side view, forming figure 9 of W. Phillips's text. The instrument and original photograph are pre-1917.

Primary Inscriptions:

Provenance:

Presented by the Marconi Corporation in 2003. Part of the Elliott Archive.

Blueprint Vector Diagram Relating to a Power Factor Indicator, by Elliott Brothers, September 1929

In Elliott Archive 4/20/2, typescipt description of dynamometer instruments. Blueprint vector diagram showing the relation between voltage and main current in a power factor indicator, forming figure 8 of W. Phillips's text. Square.

Primary Inscriptions:

Provenance:

Presented by the Marconi Corporation in 2003. Part of the Elliott Archive.